| 摘要 |
PURPOSE: A plastic surface treatment having graphical function and advertising effect is provided to improve the appearance of a product and to heighten the advertising effect by graphically treating the surface of plastics. CONSTITUTION: A groove(4) is formed at the upper surface of a transparent cover(1). An advertising unit(2) is mounted at the groove. The advertising unit is covered with an advertising cover(3), and is pressed by ultrasonic waves.
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